| This research study addresses issues associated with application of the random PWM technique to the propulsion system of a naval vessel, particularly an electric submarine. Although certain experiments with drives with random PWM have already been published, all the drives investigated have been of very low power, and the extent of the studies has been narrow. Thanks to the generous sponsorship of US Navy, the experimental investigation described in this thesis was wider in scope, and the drive was much larger that in the other studies. Simultaneous variations of the switching and sampling periods constitute a major disadvantage of known RPWM technique. Therefore, a novel RPWM technique has been developed to overcome this drawback, and is presented in this thesis. Analytical background, comparative analysis, computer simulations, and experimental results obtained from a laboratory model of submarine propulsion system are presented. |
